Question

giúp em với ạ

Answer 1

a)\(x^2-3=\left(x-3\right)x\)

b)\(x^2-36=\left(x-6\right)^2=\left(x-6\right)\left(x+6\right)\)

c)\(x^2+2x+1=x^2+x+x+1=x\left(x+1\right)+\left(x+1\right)=\left(x+1\right)^2\)

d)\(x^2-4x+4=x^2-2x2+4=\left(x-2\right)^2=\left(x-2\right)\left(x+2\right)\)

e)\(5x+x^2=x\left(5+x\right)\)

f)\(4x^2-9=\left(2x\right)^2-9=\left(2x-3\right)\left(2x+3\right)\)

h)\(4x-x^2=x\left(4-x\right)\)

i\(x^2+6x+9=x^2+2x3+9=\left(x+3\right)^2=\left(x+3\right)\left(x-3\right)\)